Sandpapering-machine.



N0; 688,l 2. Patented Dec. l0, l90l. A. M. HALL & C. C. STUART.

SANDPAPEBING MACHINE;

(Application filed Mar. 15, 1901.)

' 3 Shaets$heet I.

(No Made l.)

I Z i? 6 ,mz/enzm 7 v flzineavevw Patented Dec. l0, I901.

R A U T s Q 0 & IL L A H M A w 8 8 6 0 N SANDPAPERING MACHINE.

(Application filed Mar. 15, 1901.)

(No Model.

3 Sheets-Sheet 2.

'No. 688,512. Patented Dec. l0, IQOI.

A. M. HALL & 0., C. STUART.

SANDPAPERING MACHINE.

(Applicutiqn filed Mar. 15, 1901.

A F4710, F1715 77 6 7 20 /6 2/ w 2/ 35 I in which- UNITED STATES PATENT Carlee.

AUGUSTUS M- HALL AND CHARLES o. STUART, or CAMPVILLE,

v CONNECTICUT.

FSANDPAPERING-MACHINEJ SPECIFICATION forming part of Letters Patent No. 688,512, dated December 10, 1901.

Application filed March 15,1901.

To all whom, it may concern;

Be it known that we, AUGUSTUS M. HALL and CHARLES C. STUART,OitiZeI1S of the United States, and residents of Campville, in the county of Litchfield and State of Connecticut, have invented anew and useful Sandpapering-Machine, of which the following is a specification. I

Our invention relates to sand papering-machines, and has for its'object to provide'a machine of the above character in which the platen for supporting the material to be operated upon and the sandpapering-rolls may be moved the one toward and away from the other, whereby the said parts may be accurately adjusted with respect to the material to be operated upon.

A further object is to provide a reciprocatin g material-supporting platen, which platen may be adjusted toward and away from the sandpapering rolls, either in connection with means for adjusting the sandpapering-rolls bodily toward and away from the platen or means for simultaneously moving a roll into chine.

and another roll out of engagement with the material support-ed by the platen.

A further object is to provide certain new and improved featuresin the construction, form, and arrangement of the several parts of the machine, whereby the material to be operated upon may be brought to the required degree of smoothness in a rapid and efficient manner. I a Y A practical embodiment of our invention is representedin the accompanying drawings,

' Figure 1 represents a view in side elevation of a machine embodying our invention, the ends-of the machine being broken away. Fig. 2 is a top plan view of the same. Fig. 3 is a transverse vertical section through the ma- Fig. 4. is a longitudinal vertical section through'the machine. Fig. 5 is a detail sectional view showing the means for moving, the roll-supporting frame bodily toward and I away from the material supporting platen.

Fig. 6 is a diagrammatic view of one of the cam bars and two' sets of sandpaperingrolls, both sets being'in their lowered position with respect to the bar. Fig. 7 is a similar view in which the bar has been rotated in Serial No. 51,239. (No model.)

one direction a quarter-turn to-lift one set of rolls upwardly, while the other set is permitted .to rest inits lowered position with respect to the bar. Fig. 8 is asimilar View in which the bar has been rotated a quarter-turn in the opposite direction from the position shown in Fig.6, showing the reverse positions of the .set of rolls to that presented in Fig. 7. Fig.

9 is a similar View showing the bar turned to an intermediate position, where both sets of rolls are held at the limit of their upward movement with respect to the bar. an enlarged cross-section through the bar, taken in the plane of the line A A of Fig. 6. Fig. 11 is an enlarged cross-section through the 'bar,taken in the plane of the line B B of Fig. 6.

Fig. 12 is an enlarged cross-section through the bar, taken in the plane of the line C O of Fig. 9. Fig. 13 is an 'enlarged'cross-section Fig. 10 is through the bar, taken in the plane of the line it is mounted upon aplaten-sup'portiug frame g, which frame isreciprocated by the followingmeans: A main drive-shaft h is mounted to rotate in the main frame of the machine I and extends'transversely across the same.

This drive-shaft is provided-with a fixed pule ley 2', whereby the shaft may be driven'from a source of power 'not shown herein. A pair of loose pulleys j k are mounted on a cross-shaft- Z, which pulleys have, respectively, a straight and cross belt connection with a pair of fast pulleys m n on the drive-shaft h. "A suitable clutch mechanism 0 is mounted on the cross shaft Z in position to connect the one or the other of the oppositely-rotating pulleys 7'70 to the shaft Zfor rotating the shaft'in either of two directions. This shaft Z is provided with sandpapering roll. shafts.

two trains of gears for rotating a pair of pinions 11 q, which mesh with a pair of rack-bars r s, located along the under side of the platensupporting frame g. This geared connection between the pinions and the clutch-shaft Z is preferably so arranged as to reduce the speed to a considerable degree to permit aslow movement of the platen.

The platen-supporting frameg may be suitably supported and guided in the usual manner upon the central beam 6 and the two side beams c d of the frame.

The sandpapering-roll-supporting framet is shown herein as of oblong rectangular form for supporting therein a plurality of sandpapering-rolls u. The opposite ends of each of the roll-shafts are mounted in sliding boxes 1) in the opposite side bars of the frame t, which boxes are held yieldingly at the limits of their outward movements by heavy springs w. This spring tension will permit the rolls to yield when any undue strain is brought to bear therein that would tend to break or disarrange the same.

In the form shown in Figs. 1 to 5, inclusive, the supporting-frame t is made adjustable toward and away from the platen f in the following. manner: The inner faces of the uprights ab of the main frame are provided with vertical elongated grooves m and y, within which are located the free ends of the guideblocks .2 and 2, projecting outwardly from the sides. of the roll-supporting frame. These guide-blocks z and 2 are provided with vertical screw-threaded holes therethrough, arranged to receive the adj Listing-screws 3 and 4, whichare mounted in the uprights a and b. These screws are simultaneously. rotated either in adirection to raise the roll-support-v ing: frame or lower the same. by providing a bevel-gear connection between the upper ends of the said screws and a cross-shaft 5, mount ed in. the uprights'a and b and provided with a suitable operating hand-wheel 6 at one side of the machine.

In the form shown. in Figs. 14: and 15 the roll-supporting frame tis shown as being held stationary with respect to the main frame by means of screw-bolts 1, which secure the uprights to the blocks which project outwardly from the sides of the roll-supporting frame.

In the present instance we have shown the manner of securing the block 2 to its corresponding upright a, and it is to be understood that the other block 2 is secured to the upright b in a similar manner.

The means which we employ for simultaneously moving the sandpapering-rolls into and out of operative position and also for, simultaneously movinga roll into and another roll out ofoperative positionis as follows: A pair of longitudinally-extended connected cam-bars 7 and 8 are mounted in the side bars of the roll-supporting frame t in contact with the journal-boxes v at the opposite ends of the These cambars are connected so that, they will be rotated together in the same direction by providing short arms 9 and 10 at their front ends, the said arms being connected by a cross-bar 11 at points equal distances from the axes of the said cam-bars. One of these arms,in the present instance the arm 10, is extended upwardly to form an operating-handle 12. A sector 13 is provided concentric with the axis of the cam-bar 8, and the handle 12 is provided with a clamp-nut 14, arranged to engage the sector 13 for clamping the cam-bars in any of their rotary adjustments. As each one of the cambars is constructed in the same manner, we will describe one only of the said bars. The cam-bar is provided at points where it engages the bearing-boxes of the several rolls with a series of depressions or flattened portions 15 16 17 18 in alinement with each other along the bar, so that when this portion of the bar is in engagement with the bearingboxes of the several rolls all of the rolls will be at the limits of their downward movements toward the platen. At points one-quarter way around the periphery of the bar from the depressed portions above referred to uponeach side thereof we provide flattened or depressed portions, so arranged that when the flattened portions upon one side are in engagement with the bearing-boxes of the rolls those rolls will be at the limits of their downward movements and the remaining rolls will beheld at the limits of their upward movements away from the platen, and viceversa. In the present instance we have shown the rolls arranged in two sets of two each and the cam-bar provided on one side of thefull series of depressions with a pair of depressions 19 20 for operating one set of the rolls,and upon the other side of the full series of depressions witha pair of depressions 21 22, arranged to operate the other set of rolls. It will thus beseen that by turning the cam-bars the rollsvmay be moved simultaneously toward and away from the platen and also that one set'of rolls may be moved into operative position as the other set of rolls is moved awayfrom its operative position.v

The shafts of the several sandpaperingrolls are provided with driving-pulleys 23 24 25 26, which are engaged by a singlebelt27. This belt passes around a fast pulley 28 on the drive-shaft it, around a fast pulley'29on a shaft 30, mounted on the tops of the uprights a and b, and also aroundan idler-pulley 31, mounted on a shaft 32 in a position corresponding to the shaft h upon the other side .of the uprights ab. The several pulleys around which thisbelt travels are so related to each other that when the roll-supporting framet is made adjustable it may be raised andlowered without interferingwith the movement of the belt. This belt is passed around the several pulleys of the rolls in such a direction as to rotate the two rolls of each set in, opposite directions. To reinforce thedrive of the main belt to prevent its slipping, we provide an auxiliary belt 33 at the other side of the machine, which passes around a fast pulley 34 on the drive-shaft h and around a fast pulley 35 on the shaft 30, which carries the fast pulley 29, over which the main belt passes.

The means which we have shown for adjusting the material-supporting platen f toward and away from the sandpapering-rolls comprises the following parts: Gross-shafts 36 are mounted at intervals in the frame 9, which shafts are provided with cams 37, arranged to bear against the under face of the platen, f, so that as the shafts 36 are rotated in one direction the cams will lift the platen f away from the frame g, and when the shafts are turned in the opposite direction the cams will permit the platen f to return to its position upon the frame. A longitudinally-extended shaft38 is mounted in the supportingframe 9 and has a worm-gear connection 39 with each of the shafts 36, whereby all of the cams 37 may be operated simultaneously. This longitudinal shaft 38 may be provided with a suitable crank-handle 40 at a point exterior to the end of the platen-supporting frame for use in adjusting the platen. The platen f may be guided in its movements toward and away from. the sandpapering-rolls by a plurality of guides 41, fitted to slide in vertical slots 42 in the sides of the frame g.

It will be seen that by theuse of the machine hereinabove set forth it is possible to adjust the platen toward and away from the rolls. It is also possible to adjust all of the sandpapering-rolls toward and away'from the platen, and it is also possible to simultaneously move one or more rolls into operative engagement and the balance of the rolls out of operative engagement. The material being treated may be reciprocated beneath the sandpapering rolls, and the rolls may be brought intoopera'tivecontact therewith until the material is brought to the required smoothness. It will thus be seen that the material may be completely finished before it is necessary to again'handle the same.

It is evident that changes might be resorted to in the form and arrangement of the several parts without departing from the spirit and scope-of ourinvention. Hencewe do not wish to limit ourselves strictly to the struc- .ture herein set forth; but I What we claim is- Y 1. In combination, a platen for supporting the material to be operated upon, sandpapering-rolls for operating upon the material, means for moving the platen toward and away from the sand papering-rolls and an adjusting device common to all of the rolls for moving the 'rolls simultaneously toward and away from the platen, substantitlly as set forth.

2. Inv combination, a platen for supporting the material to be'operated upon, sandpapering-rolls for operating upon the material,

.means for moving the platen toward and away from the sandpapering-rolls and means for simultaneously moving a rollinto and another roll out of operative engagement with the material upon the platen,substantially as set forth.

3. In combination, a platen for supporting the material to be operated upon, sandpaperingrolls for operating upon the material, means for moving the platen toward and away from the sandpapering-rolls, means'for simultaneously moving the rolls toward and away from the platen and means for simultaneously moving a roll into and another roll out of operative engagement with the material, substantially as set forth.

4. In combination, a platen for supporting the material to be operated upon, a plurality of sandpapering-rolls, a stationary supporting-frame therefor and means for simultaneously moving one rollinto and another roll out of operative engagement with the. material, substantially as set forth.

5. In combination, a platen for supporting the material to be operated upon, a plurality of sandpapering-rolls, a stationary supporting-frame therefor, means for adjusting the platen toward and away-from the said rolls and means for simultaneously moving a roll into and another roll out of operative engagement with the material upon the said platen, substantially as set forth.

6. In combination, a platen for supporting the material to be operated upon,a plurality of sandpapering-rolls, a stationary supporting-frame therefor, means for simultaneously moving the rolls toward and away from the platen and means for simultaneously moving a roll into and another roll out of operative .of sandpapering-rolls, a stationary support ing-frame therefor, means for moving the platen toward and away from the sandpapering-rolls, means for simultaneously moving the'rolls toward and away from the platen and means for simultaneously moving a roll into and another roll out of operative engagement with the material, substantially as set forth.

8. In combination, a reciprocating platen for supporting the material to be operated upon, sandpapering-rolls for operating upon the material; means for moving the platen toward and away from the sandpapering-rolls and an adjusting device common to all of the rolls for simultaneously moving the rolls toward and away from the platen, substantially as set forth.

9. In combination, a reciprocating platen for supporting the material to be operated upon, sandpapering-rolls for operating upon the material, means for moving the platen toward and away from the sandpapering-rolls and means for simultaneously moving a roll reciprocating platen -supporting frame, a 15 platen carried thereby, and means for adj usting the platen toward and away from the sandpapering-rolls, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signed our names, in 20 presence of two witnesses, this 11th day of March, 1901. e

AUGUSTUS M. HALL. CHARLES o. STUART.

Witnesses:

FREDK. HAYNES, HENRY THIEME. 

